Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1983-12-02
1987-05-26
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record medium
In container
242199, G11B 2304
Patent
active
046690212
ABSTRACT:
A tape cassette is used with a recording and/or reproducing apparatus which has an optical tape end detector which is constituted by a light emitting element and light receiving elements. The tape cassette comprises an opaque cassette case having a transparent window, and a lid located at the front of the cassette case. The cassette case accommodates therein a supply reel, a take-up reel, and a magnetic tape. The transparent window enables visual detection of a wound state of the magnetic tape with respect to the reels. The magnetic tape has transparent tapes connected at ends thereof, and forms a predetermined tape path along the front of the cassette case. The transparent tapes are optically detected by the optical tape end detector when the transparent tapes are drawn out from the reels. The lid is capable of assuming an open state and a closed state, and covers the magnetic tape in the predetermined tape path in its closed state. The transparent window is formed in a top plate of the cassette case, in a region which is closer to the rear of the cassette case than a line which passes centers of the reels in a plan view of the tape cassette.
REFERENCES:
patent: 4419708 (1983-12-01), Ogiro et al.
Kelm, K., "A Simple Tape-Tension Measuring Cassette for Home Construction", Elktron Inc., No. 8, 1981.
Umeda Hiroyuki
Wakui Yoshiaki
Severin David J.
Victor Company of Japan Ltd.
Wolff John H.
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